CVE-2024-49959

MEDIUM EPSS 17.2%
Published Oct 21, 20241y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Oct 21, 2024 1y ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: jbd2: stop waiting for space when jbd2_cleanup_journal_tail() returns error In __jbd2_log_wait_for_space(), we might call jbd2_cleanup_journal_tail() to recover some journal space. But if an error occurs while executing jbd2_cleanup_journal_tail() (e.g., an EIO), we don't stop waiting for free space right away, we try other branches, and if j_committing_transaction is NULL (i.e., the tid is 0), we will get the following complain: ============================================ JBD2: I/O error when updating journal superblock for sdd-8. __jbd2_log_wait_for_space: needed 256 blocks and only had 217 space available __jbd2_log_wait_for_space: no way to get more journal space in sdd-8 ------------[ cut here ]------------ WARNING: CPU: 2 PID: 139804 at fs/jbd2/checkpoint.c:109 __jbd2_log_wait_for_space+0x251/0x2e0 Modules linked in: CPU: 2 PID: 139804 Comm: kworker/u8:3 Not tainted 6.6.0+ #1 RIP: 0010:__jbd2_log_wait_for_space+0x251/0x2e0 Call Trace: <TASK> add_transaction_credits+0x5d1/0x5e0 start_this_handle+0x1ef/0x6a0 jbd2__journal_start+0x18b/0x340 ext4_dirty_inode+0x5d/0xb0 __mark_inode_dirty+0xe4/0x5d0 generic_update_time+0x60/0x70 [...] ============================================ So only if jbd2_cleanup_journal_tail() returns 1, i.e., there is nothing to clean up at the moment, continue to try to reclaim free space in other ways. Note that this fix relies on commit 6f6a6fda2945 ("jbd2: fix ocfs2 corrupt when updating journal superblock fails") to make jbd2_cleanup_journal_tail return the correct error code.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
17.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 6

VendorProductVersionRange
linuxlinux_kernel*≥2.6.28  –  <5.10.227
linuxlinux_kernel*≥5.11  –  <5.15.168
linuxlinux_kernel*≥5.16  –  <6.1.113
linuxlinux_kernel*≥6.2  –  <6.6.55
linuxlinux_kernel*≥6.7  –  <6.10.14
linuxlinux_kernel*≥6.11  –  <6.11.3

References 11

  • git.kernel.org https://git.kernel.org/stable/c/1c62dc0d82c62f0dc8fcdc4843208e522acccaf5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3ced0fe6c0eff032733ea8b38778b34707270138
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/481e8f18a290e39e04ddb7feb2bb2a2cc3b213ed
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/70bae48377a2c4296fd3caf4caf8f11079111019
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/801a35dfef6996f3d5eaa96a59caf00440d9165e
  • git.kernel.org https://git.kernel.org/stable/c/c6bf043b210eac67d35a114e345c4e5585672913
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d5dc65370a746750dbb2f03eabcf86b18db65f32
  • git.kernel.org https://git.kernel.org/stable/c/ec7f8337c98ad281020ad1f11ba492462d80737a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f5cacdc6f2bb2a9bf214469dd7112b43dd2dd68a
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1c62dc0d82c62f0dc8fcdc4843208e522acccaf5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3ced0fe6c0eff032733ea8b38778b34707270138
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/481e8f18a290e39e04ddb7feb2bb2a2cc3b213ed
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/70bae48377a2c4296fd3caf4caf8f11079111019
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c6bf043b210eac67d35a114e345c4e5585672913
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ec7f8337c98ad281020ad1f11ba492462d80737a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f5cacdc6f2bb2a9bf214469dd7112b43dd2dd68a
    Patch