CVE-2024-26840

一、漏洞信息
漏洞编号：CVE-2024-26840
漏洞归属组件：kernel
漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0
CVSS V2.0分值：
BaseScore：0.0 Low
Vector：CVSS：2.0/
漏洞简述：
In the Linux kernel, the following vulnerability has been resolved:cachefiles: fix memory leak in cachefiles_add_cache()The following memory leak was reported after unbinding /dev/cachefiles:==================================================================unreferenced object 0xffff9b674176e3c0 (size 192): comm cachefilesd2 , pid 680, jiffies 4294881224 hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc ea38a44b): [] kmem_cache_alloc+0x2d5/0x370 [] prepare_creds+0x26/0x2e0 [] cachefiles_determine_cache_security+0x1f/0x120 [] cachefiles_add_cache+0x13c/0x3a0 [] cachefiles_daemon_write+0x146/0x1c0 [] vfs_write+0xcb/0x520 [] ksys_write+0x69/0xf0 [] do_syscall_64+0x72/0x140 [] entry_SYSCALL_64_after_hwframe+0x6e/0x76==================================================================Put the reference count of cache_cred in cachefiles_daemon_unbind() tofix the problem. And also put cache_cred in cachefiles_add_cache() errorbranch to avoid memory leaks.
漏洞公开时间：2024-04-17 18:15:09
漏洞创建时间：2024-04-17 19:44:22
漏洞详情参考链接：
https://nvd.nist.gov/vuln/detail/CVE-2024-26840

更多参考(点击展开)

参考来源	参考链接	来源链接
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/037d5a949b0455540ef9aab34c10ddf54b65d285
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/38e921616320d159336b0ffadb09e9fb4945c7c3
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/43eccc5823732ba6daab2511ed32dfc545a666d8
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8b218e2f0a27a9f09428b1847b4580640b9d1e58
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/94965be37add0983672e48ecb33cdbda92b62579
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9cac69912052a4def571fedf1cb9bb4ec590e25a
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cb5466783793e66272624cf71925ae1d1ba32083
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e21a2f17566cbd64926fb8f16323972f7a064444
suse_bugzilla	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26840	https://bugzilla.suse.com/show_bug.cgi?id=1222976
suse_bugzilla	https://www.cve.org/CVERecord?id=CVE-2024-26840	https://bugzilla.suse.com/show_bug.cgi?id=1222976
suse_bugzilla	https://git.kernel.org/stable/c/037d5a949b0455540ef9aab34c10ddf54b65d285	https://bugzilla.suse.com/show_bug.cgi?id=1222976
suse_bugzilla	https://git.kernel.org/stable/c/38e921616320d159336b0ffadb09e9fb4945c7c3	https://bugzilla.suse.com/show_bug.cgi?id=1222976
suse_bugzilla	https://git.kernel.org/stable/c/43eccc5823732ba6daab2511ed32dfc545a666d8	https://bugzilla.suse.com/show_bug.cgi?id=1222976
suse_bugzilla	https://git.kernel.org/stable/c/8b218e2f0a27a9f09428b1847b4580640b9d1e58	https://bugzilla.suse.com/show_bug.cgi?id=1222976
suse_bugzilla	https://git.kernel.org/stable/c/94965be37add0983672e48ecb33cdbda92b62579	https://bugzilla.suse.com/show_bug.cgi?id=1222976
suse_bugzilla	https://git.kernel.org/stable/c/9cac69912052a4def571fedf1cb9bb4ec590e25a	https://bugzilla.suse.com/show_bug.cgi?id=1222976
suse_bugzilla	https://git.kernel.org/stable/c/cb5466783793e66272624cf71925ae1d1ba32083	https://bugzilla.suse.com/show_bug.cgi?id=1222976
suse_bugzilla	https://git.kernel.org/stable/c/e21a2f17566cbd64926fb8f16323972f7a064444	https://bugzilla.suse.com/show_bug.cgi?id=1222976
suse_bugzilla	https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-26840.mbox	https://bugzilla.suse.com/show_bug.cgi?id=1222976
redhat_bugzilla	https://lore.kernel.org/linux-cve-announce/2024041715-CVE-2024-26840-057d@gregkh/T	https://bugzilla.redhat.com/show_bug.cgi?id=2275573
ubuntu	https://www.cve.org/CVERecord?id=CVE-2024-26840	https://ubuntu.com/security/CVE-2024-26840
ubuntu	https://git.kernel.org/linus/e21a2f17566cbd64926fb8f16323972f7a064444 (6.8-rc6)	https://ubuntu.com/security/CVE-2024-26840
ubuntu	https://git.kernel.org/stable/c/cb5466783793e66272624cf71925ae1d1ba32083	https://ubuntu.com/security/CVE-2024-26840
ubuntu	https://git.kernel.org/stable/c/037d5a949b0455540ef9aab34c10ddf54b65d285	https://ubuntu.com/security/CVE-2024-26840
ubuntu	https://git.kernel.org/stable/c/43eccc5823732ba6daab2511ed32dfc545a666d8	https://ubuntu.com/security/CVE-2024-26840
ubuntu	https://git.kernel.org/stable/c/94965be37add0983672e48ecb33cdbda92b62579	https://ubuntu.com/security/CVE-2024-26840
ubuntu	https://git.kernel.org/stable/c/8b218e2f0a27a9f09428b1847b4580640b9d1e58	https://ubuntu.com/security/CVE-2024-26840
ubuntu	https://git.kernel.org/stable/c/38e921616320d159336b0ffadb09e9fb4945c7c3	https://ubuntu.com/security/CVE-2024-26840
ubuntu	https://git.kernel.org/stable/c/9cac69912052a4def571fedf1cb9bb4ec590e25a	https://ubuntu.com/security/CVE-2024-26840
ubuntu	https://git.kernel.org/stable/c/e21a2f17566cbd64926fb8f16323972f7a064444	https://ubuntu.com/security/CVE-2024-26840
ubuntu	https://nvd.nist.gov/vuln/detail/CVE-2024-26840	https://ubuntu.com/security/CVE-2024-26840
ubuntu	https://launchpad.net/bugs/cve/CVE-2024-26840	https://ubuntu.com/security/CVE-2024-26840
ubuntu	https://security-tracker.debian.org/tracker/CVE-2024-26840	https://ubuntu.com/security/CVE-2024-26840
debian		https://security-tracker.debian.org/tracker/CVE-2024-26840

漏洞分析指导链接：
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
漏洞数据来源:
openBrain开源漏洞感知系统
漏洞补丁信息：

详情(点击展开)

影响的包	修复版本	修复补丁	问题引入补丁	来源
linux		https://git.kernel.org/linus/e21a2f17566cbd64926fb8f16323972f7a064444	https://git.kernel.org/linus/9ae326a69004dea8af2dae4fde58de27db700a8d	ubuntu

二、漏洞分析结构反馈
影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:cachefiles: fix memory leak in cachefiles_add_cache()The following memory leak was reported after unbinding /dev/cachefiles:==================================================================unreferenced object 0xffff9b674176e3c0 (size 192): comm cachefilesd2 , pid 680, jiffies 4294881224 hex dump (first 32 bytes): 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc ea38a44b): [] kmem_cache_alloc+0x2d5/0x370 [] prepare_creds+0x26/0x2e0 [] cachefiles_determine_cache_security+0x1f/0x120 [] cachefiles_add_cache+0x13c/0x3a0 [] cachefiles_daemon_write+0x146/0x1c0 [] vfs_write+0xcb/0x520 [] ksys_write+0x69/0xf0 [] do_syscall_64+0x72/0x140 [] entry_SYSCALL_64_after_hwframe+0x6e/0x76==================================================================Put the reference count of cache_cred in cachefiles_daemon_unbind() tofix the problem. And also put cache_cred in cachefiles_add_cache() errorbranch to avoid memory leaks.
openEuler评分：
3.3
Vector：CVSS：2.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
受影响版本排查(受影响/不受影响)：
1.openEuler-20.03-LTS-SP1(4.19.90):受影响
2.openEuler-20.03-LTS-SP4(4.19.90):受影响
3.openEuler-22.03-LTS(5.10.0):受影响
4.openEuler-22.03-LTS-SP1(5.10.0):受影响
5.openEuler-22.03-LTS-SP2(5.10.0):受影响
6.openEuler-22.03-LTS-SP3(5.10.0):受影响
7.master(6.1.0):不受影响
8.openEuler-22.03-LTS-Next(5.10.0):不受影响
9.openEuler-24.03-LTS:不受影响
10.openEuler-24.03-LTS-Next:不受影响

修复是否涉及abi变化(是/否)：
1.openEuler-20.03-LTS-SP1(4.19.90):否
2.openEuler-20.03-LTS-SP4(4.19.90):否
3.openEuler-22.03-LTS(5.10.0):否
4.openEuler-22.03-LTS-SP1(5.10.0):否
5.openEuler-22.03-LTS-SP2(5.10.0):否
6.openEuler-22.03-LTS-SP3(5.10.0):否
7.master(6.1.0):否
8.openEuler-22.03-LTS-Next(5.10.0):否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否

三、漏洞修复
安全公告链接：https://www.openeuler.org/zh/security/safety-bulletin/detail/?id=openEuler-SA-2024-1622

Hi openeuler-ci-bot, welcome to the openEuler Community.
I'm the Bot here serving you. You can find the instructions on how to interact with me at Here.
If you have any questions, please contact the SIG: Kernel, and any of the maintainers.

@YangYingliang ,@成坚 (CHENG Jian) ,@jiaoff ,@AlexGuo ,@hanjun-guo ,@woqidaideshi ,@Jackie Liu ,@Zhang Yi ,@colyli ,@ThunderTown ,@htforge ,@Chiqijun ,@冷嘲啊 ,@zhujianwei001 ,@kylin-mayukun ,@wangxiongfeng ,@Kefeng ,@SuperSix173 ,@WangShaoBo ,@Zheng Zucheng
issue处理注意事项:
1. 当前issue受影响的分支提交pr时, 须在pr描述中填写当前issue编号进行关联, 否则无法关闭当前issue;
2. 模板内容需要填写完整, 无论是受影响或者不受影响都需要填写完整内容,未引入的分支不需要填写, 否则无法关闭当前issue;
3. 以下为模板中需要填写完整的内容, 请复制到评论区回复, 注: 内容的标题名称(影响性分析说明, openEuler评分, 受影响版本排查(受影响/不受影响), 修复是否涉及abi变化(是/否))不能省略,省略后cve-manager将无法正常解析填写内容.

影响性分析说明:

openEuler评分: (评分和向量)

受影响版本排查(受影响/不受影响):
1.master(6.1.0):
2.openEuler-20.03-LTS-SP1(4.19.90):
3.openEuler-20.03-LTS-SP4(4.19.90):
4.openEuler-22.03-LTS(5.10.0):
5.openEuler-22.03-LTS-Next(5.10.0):
6.openEuler-22.03-LTS-SP1(5.10.0):
7.openEuler-22.03-LTS-SP2(5.10.0):
8.openEuler-22.03-LTS-SP3(5.10.0):
9.openEuler-24.03-LTS:
10.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：
1.master(6.1.0):
2.openEuler-20.03-LTS-SP1(4.19.90):
3.openEuler-20.03-LTS-SP4(4.19.90):
4.openEuler-22.03-LTS(5.10.0):
5.openEuler-22.03-LTS-Next(5.10.0):
6.openEuler-22.03-LTS-SP1(5.10.0):
7.openEuler-22.03-LTS-SP2(5.10.0):
8.openEuler-22.03-LTS-SP3(5.10.0):
9.openEuler-24.03-LTS:
10.openEuler-24.03-LTS-Next:

issue处理具体操作请参考:
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
pr关联issue具体操作请参考:
https://gitee.com/help/articles/4142

参考网址	关联pr	状态	补丁链接
https://nvd.nist.gov/vuln/detail/CVE-2024-26840	None	None	https://git.kernel.org/stable/c/38e921616320d159336b0ffadb09e9fb4945c7c3 https://git.kernel.org/stable/c/e21a2f17566cbd64926fb8f16323972f7a064444 https://git.kernel.org/stable/c/43eccc5823732ba6daab2511ed32dfc545a666d8 https://git.kernel.org/stable/c/037d5a949b0455540ef9aab34c10ddf54b65d285 https://git.kernel.org/stable/c/cb5466783793e66272624cf71925ae1d1ba32083 https://git.kernel.org/stable/c/8b218e2f0a27a9f09428b1847b4580640b9d1e58 https://git.kernel.org/stable/c/94965be37add0983672e48ecb33cdbda92b62579 https://git.kernel.org/stable/c/9cac69912052a4def571fedf1cb9bb4ec590e25a
https://ubuntu.com/security/CVE-2024-26840	None	None	https://discourse.ubuntu.com/c/ubuntu-pro
https://www.opencve.io/cve/CVE-2024-26840	None	None	https://git.kernel.org/stable/c/38e921616320d159336b0ffadb09e9fb4945c7c3 https://git.kernel.org/stable/c/e21a2f17566cbd64926fb8f16323972f7a064444 https://git.kernel.org/stable/c/43eccc5823732ba6daab2511ed32dfc545a666d8 https://git.kernel.org/stable/c/037d5a949b0455540ef9aab34c10ddf54b65d285 https://git.kernel.org/stable/c/cb5466783793e66272624cf71925ae1d1ba32083 https://git.kernel.org/stable/c/8b218e2f0a27a9f09428b1847b4580640b9d1e58 https://git.kernel.org/stable/c/94965be37add0983672e48ecb33cdbda92b62579 https://git.kernel.org/stable/c/9cac69912052a4def571fedf1cb9bb4ec590e25a
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2024-26840
https://security-tracker.debian.org/tracker/CVE-2024-26840

说明：补丁链接仅供初步排查参考，实际可用性请人工再次确认，补丁下载验证可使用CVE补丁工具。
若补丁不准确，烦请在此issue下评论 '/report-patch 参考网址补丁链接1,补丁链接2' 反馈正确信息，便于我们不断优化工具，不胜感激。
如 /report-patch https://security-tracker.debian.org/tracker/CVE-2021-3997 https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1

@ci-robot 请确认分支: master,openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS,openEuler-22.03-LTS-Next,openEuler-22.03-LTS-SP1,openEuler-22.03-LTS-SP2,openEuler-22.03-LTS-SP3,openEuler-24.03-LTS,openEuler-24.03-LTS-Next 受影响/不受影响.
请确认分支信息是否填写完整,否则将无法关闭当前issue.

@zhangchangzhong 请确认分支: master,openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS,openEuler-22.03-LTS-Next,openEuler-22.03-LTS-SP1,openEuler-22.03-LTS-SP2,openEuler-22.03-LTS-SP3,openEuler-24.03-LTS,openEuler-24.03-LTS-Next 受影响/不受影响.
请确认分支信息是否填写完整,否则将无法关闭当前issue.

@chenyi 请确认分支: master,openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS,openEuler-22.03-LTS-Next,openEuler-22.03-LTS-SP1,openEuler-22.03-LTS-SP2,openEuler-22.03-LTS-SP3,openEuler-24.03-LTS,openEuler-24.03-LTS-Next 受影响/不受影响.
请确认分支信息是否填写完整,否则将无法关闭当前issue.

@zhangjialin 请确认分支: master,openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP4,openEuler-22.03-LTS,openEuler-22.03-LTS-Next,openEuler-22.03-LTS-SP1,openEuler-22.03-LTS-SP2,openEuler-22.03-LTS-SP3,openEuler-24.03-LTS,openEuler-24.03-LTS-Next 受影响/不受影响.
请确认分支信息是否填写完整,否则将无法关闭当前issue.

CVE-2024-26840

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

cachefiles: fix memory leak in cachefiles_add_cache()

The following memory leak was reported after unbinding /dev/cachefiles:

==================================================================
unreferenced object 0xffff9b674176e3c0 (size 192):
comm "cachefilesd2", pid 680, jiffies 4294881224
hex dump (first 32 bytes):
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace (crc ea38a44b):
[] kmem_cache_alloc+0x2d5/0x370
[] prepare_creds+0x26/0x2e0
[] cachefiles_determine_cache_security+0x1f/0x120
[] cachefiles_add_cache+0x13c/0x3a0
[] cachefiles_daemon_write+0x146/0x1c0
[] vfs_write+0xcb/0x520
[] ksys_write+0x69/0xf0
[] do_syscall_64+0x72/0x140
[] entry_SYSCALL_64_after_hwframe+0x6e/0x76

Put the reference count of cache_cred in cachefiles_daemon_unbind() to
fix the problem. And also put cache_cred in cachefiles_add_cache() error
branch to avoid memory leaks.

openEuler评分:(评分和向量)
3.3
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

受影响版本排查(受影响/不受影响):
1.openEuler-20.03-LTS-SP1:受影响
2.openEuler-20.03-LTS-SP4:受影响
3.openEuler-22.03-LTS:受影响
4.openEuler-22.03-LTS-SP1:受影响
5.openEuler-22.03-LTS-SP2:受影响
6.openEuler-22.03-LTS-SP3:受影响
7.master(6.1.0):不受影响
8.openEuler-22.03-LTS-Next:不受影响
9.openEuler-24.03-LTS:不受影响
10.openEuler-24.03-LTS-Next:不受影响

修复是否涉及abi变化(是/否)：
1.openEuler-20.03-LTS-SP1(4.19.90):否
2.openEuler-20.03-LTS-SP4:否
3.openEuler-22.03-LTS:否
4.openEuler-22.03-LTS-SP1:否
5.openEuler-22.03-LTS-SP2:否
6.openEuler-22.03-LTS-SP3:否
7.master(6.1.0):否
8.openEuler-22.03-LTS-Next:否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否

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